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You can first dissociate it with alkali, extract it with dichloromethane and react with equimolar amount of acetic anhydride, and then use sodium carbonate aqueous solution to wash it, and then evaporate dichloromethane

 This is feasible.

 The by-product is methylamine mesylate，washed with water,then can be removed

An additional route, 3-phenyl-2-propanol and methansulfonyl chloride, Triethylamine as alkali, in dichloromethane, raw material: methansulfonyl chloride: triethylamine mole ratio of 1:1.05:1.1, after treatment directly washing, steam can be directly to the next step. Crude and tetrahydrofuran...

An additional route, 3-phenyl-2-propanol and methansulfonyl chloride, and then react with methylamine can also yield the target product